问题标题：
原文选段：Thetheoryofglobalwarmingisnolongeratheory.MostscientistsagreethattheearthisgettingwarmerandthatCO2gasesarepartoftheproblem.Butisglobalwarminggoingtodestroytheplanetthrooughhiscarelessnessandindiff
问题描述：
原文选段：
Thetheoryofglobalwarmingisnolongeratheory.MostscientistsagreethattheearthisgettingwarmerandthatCO2gasesarepartoftheproblem.Butisglobalwarminggoingtodestroytheplanetthrooughhiscarelessnessandindifference?Probablynot.
Whydidtheauthorsay"thetheotyofglobalwarmingisnolongeratheory"accordingtothepassage?
A.Becausethistheoryisnotsocomplicatedasitusedtobe.
B.Becauseglobalwarminghasbeentakingplace.
C.Becausenoweveryoneunderstandthetheoryanditiscommonknowledgeratherthanatheory.
D.Becauseglobalwarmingwon'thappenandtheorywillexistnolonger.
彭寒梅回答：
选B.
题干有accordingtothepassage.文章中提到原因是MostscientistsagreethattheearthisgettingwarmerandthatCO2gasesarepartoftheproblem.因为isgetting,所以已经在发生了.B选项hasbeentakingplace,过去完成进行时,表示过去现在一直在发生,将来很可能继续发生,符合题意.
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